The Makita 4-1/2" Angle Grinder 9564CV has a super joint system that helps prevent kickback.

 

FEATURES:
-5 stage variable speed control dial for matching the RPM to the work
-Improved 12 AMP motor design for increased output power in a more compact tool
-Larger and improved carbon brush material for longer tool life
-Electronic limiter stops the motor and prevents accidental motor overload and burnout
-"Tool-less" wheel guard adjustment for easy clamping
-Labyrinth construction seals and protects the motor and bearings from dust and debris by creating a complex set of channels 

SPECIFICATIONS:
*Grinding Wheel 4-1/2"
*Wire Cup Brush 3"
*Sanding Disc 4-1/2"
*No Load Speed 2,800-10,500
*AMPS (120V) 12
*Spindle Thread 5/8" - 11 UNC
*Overall Length 11-3/4"
*Net Weight 4.0 lbs.